Range of application

Measurement and correction of dynamic unbalance of machined
turbocharger turbine wheels. Use of the machine in mid- and large-volume
production.
Fully automatic unbalance measurement and correction by grinding in two
planes and with multiple correction steps. Loading and unloading by
gantry loader.

Design

Multi-station machine with measuring and correction station and fully automatic operating sequence. Vertical balancing unit on vibration-optimized machine frame, type-dependent, exchangeable precision air bearing support for the turbine rotor, driven by special drive plate with air jets adapted to the rotor diameter.
Measured data processing by measuring unit CAB 950.
Correction station with two digitally controlled processing units for unbalance correction by polar grinding on the hub and the rear side of the rotor. Gantry loader system for linking the stations and connection of in-feed and out-feed conveyors.

Sequence of operations

The work-piece is taken from the transfer equipment and loaded into the measuring station.

Remove the rotor from the measuring station and load into the correction station.

Automatic correction: clamp, index to the correction position of the 1st plane, controlled grinding of a sector. Index to the corretion position of the 2nd plane, repeat the grinding process and unclamp.

Transfer the rotor to the measuring station and start the check run. If the rotor is not in tolerance after the 1st correction step further correction steps can be carried out.

Remove the work-piece and unload it to the out feed conveyor

Fully automatic unbalance correction in two planes, on the hub and at the rear of the turbine rotor by two grinding units. An automatic dressing unit guarantees a constant correction form to ensure precise unbalance removal during axis control.

The air-bearing balancing unit and measuring unit CAB 950 are amongst the most accurate industrial measuring systems currently in the market.
The integrated lifting device allows automatic interfacing with a loading system and protects the supports.